| 摘要 |
The present invention relates to a forklift truck 10 which comprises a truck body 2, a fork lifting element 3, a control element 8, at least one communication element 6 and a system for providing information related to the height of the load support member 1. The fork lifting element 3 is arranged to support a load support member 1 and is vertically movable by means of the fork lifting element 3. The system for providing information related to the height of the load support member 1 comprises at least one sensor 5 and at least one detection causing element 7 arranged to cause the at least one sensor 5 to register detection of the detection causing element 7. Therein the at least one sensor 5 and the at least one detection causing element 7 are arranged in relation to each other such that they move in relation to each other as the load support member 1 moves vertically and such as they pass each other at a location corresponding to at least one predetermined height of the load support member 1 and such that the detection element causes the sensor 5 to register detection at the passage. The at least one communication element 6 is arranged at said at least one sensor 5 and it is arranged to send at least one signal to the control element 8 when the at least one sensor 5 registers that the load support member 1 is passing the at least one pre-determined height. Therein the control element 8 is arranged to receive and process signals from the at least one communication element 6. The at least one communication element 6 is also arranged to send a signal to the control element 8 at pre-determined times and the control element 8 is arranged to detect reception of the signals and then to determine whether it is able to gain information from the communication element 6, based on the received signals and based on the pre-determined times. |
